Multiprocessing managers and custom classes

Question

I do not know why, but I get this strange error whenever I try to pass to the method of a shared object shared custom class object. Python version: 3.6.3

Code:

Answer 1

Found temporary solution here. I've managed to fix it by adding needed keyword to initializer of AutoProxy in multiprocessing\managers.py Though, I don't know if this kwarg is responsible for anything.